1456 CARDUACEAE 
Bracts of the involucre attenuate or subulate-tipped. I. GRAMIN IFOLIAE. 
Bracts of the involucre obtuse or merely acute or apiculate. II. OBOVATAE. 
I. AMINIFOL 
Basal and lower cauline leaves En mc elliptic to 
elliptic-ovate, obtuse blades. 1. M. graminifolia. 
Basal and lower cauline leaves with elongate linear-attenuate 
3-ribbed blades 
Heads iseüoncred? er involucral bracts less than 6 
mm. long: pappus- E ovate. 2. M. laciniarioides. 
Heads many-flowered : longer involucral bracts over 6 mm. 
long: pappus-scales lanceolate. 3. M. Williamsonii. 
II. OBO 
iiu eio one (3-3.5 mm.), half as Mens as the tube or 
Outer bracts of the involucre acute: upper cauline leaves 
oad, markedly acuminate 
o branches of the involucre obtuse or abruptly pointed : 
upper cauline nb e a end or slightly acuminate. 5. M. grandiflora. 
Corolla-throat very short (1—1.5 mm.). 
Brac a E of the receptacle spatulate or markedly clavate- 
aN 
. M. trinervia. 
. M. obovata. 
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Bractlets of the receptacie li linear, or, A Eo slightly en- 
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of the involuere obtuse or mi y acutish. 7. M.ramosa. 
8. M. Mohrii. 
1. M. graminifolia C Walt.) icum: Plant 2-11 dm. tall, the stem simple or 
y er dade brane and lower cauline leaves 3- 12 ¢ m. long, with 
I 
eS 
S 
anthera Ell.] Moist pinelands and prairies, 
Coastal Plain, Fla. to La. and N. C.—5um. 
M. laciniarioides Small. Plant 3—4 dm. 
alt the stem usually with few erect ET 
above: basal and lower eauline leaves 3-17 
em. long, with spatulate to lud pis 
acut umina pes upper cauline 
leaves smaller, several or many, with narrowly linear blades: outer ue of 
the involuere ovate- lanceolate 5-6 mm. long, with broad margins, rather 
cin au narrowed to a long tip: corolla-tube k than 5 mm . long: achene 
1-1.5 mm. long. Sandy soi Coastal Plain, Ga. to S. C.—Sum 
3. M. Willi ii Small. Plant similar to that of M. V dee but e 
and leaves fewer: blades of the basal and lower cauline leaves 8-21 cm. long, 
with li pM e to linear acuminate blades: upper aie leaves fev with 
narrowly linear blades: outer bracts of the involuere fue late, 7-8 mm. long, 
with rather made margins, acuminate: corolla-tube 6-7 mm. long: schen 2.5—3 
mm. long.—Sandy pine woods, Coastal Plain, S. C. and N. C. E —fal 
4. M. trinervia (Walt.) Porter. Plant 3-9 dm. tall, the stem piis pue 
rarely with one or few erect branches: basal and lower cauline leav weg 
long with spatulate or ‘elliptic obtuse or acute 3-veined blades 25005 ed i 
ong petiole-like bases; upper cauline leaves with elliptic, elliptic- oie or 
lanceolate markedly acuminate blades: outer bracts of the involucre ovate- 
